accessory function for pairs() to display Pearson correlations
works as upper.panel or lower.panel argument of pairs() (package graphics).
panel.cor(x, y, digits=2, cex.cor)
x |
x element of the pairs() matrix |
y |
y element of the pairs() matrix |
digits |
number of non-zero digits to leave at the end |
cex.cor |
scaling factor for displayed text |
cannibalized from an example in ?pairs (package graphics)
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